It might not be omnipotent, but Omnicom Group creates advertising that is omnipresent. The company ranks as the world's #1 corporate media services conglomerate, with advertising, marketing, and public relations operations. It serves global advertising clients through its agency networks BBDO Worldwide, DDB Worldwide, and TBWA Worldwide, while such firms as GSD&M's Idea City, Merkley + Partners, and Zimmerman Advertising provide services for regional and national clients. Its Diversified Agency Services division, including Fleishman-Hillard, Integer, and Rapp, provides public relations and other marketing services.